|5. Eng Microstrip Akhilesh Gupta - AKHILESH KUMAR GUPTA & P. K. SINGHAL|
A novel mushroom like electromagnetic band gap (EBG) structure for antenna improvement is presented in this paper. The idea proposed in this paper is etching several properly shapes in the metal surface of the mushroom-like compact EBG cell to introduce stop band in electromagnetic band gap structur. This band gap is represented by LC equivalent circuits, from which the resonant frequencies can be estimated.The effectiveness of the EBG as a surface wave suppresser is demonstrated using numerical...
Keywords: Electromagnetic Band Gap Structure; Surface Wave; Band Gap Property; Micro Strip Antenna
|Circular Patch Antenna Performance using EBG Structure|
Electromagnetic Band-Gap (EBG) structures are apopular and efficient technique for microwave applications.EBG may be combined with microstrip antenna to increasethe diversity gain, the radiation efficiency and/or to suppresssurface waves, to reduce the side lobes of the radiation patternand to increase the bandwidth. In this paper, two differentstructures will be presented and discussed, which involve: (1)EBG structure fed by circular patch antenna, and (2) circularpatch antenna surrounded by on...
Keywords: Circular patch antenna; Electromagnetic Band Gap (EBG); Bragg mirror; surface waves; Bandwidth; directivity
|Comparison of Optical Properties of Bulk and Nano Crystalline Thin Films of CdS Using Different Precursors|
The optical properties of bulk as well as nano CdS thin films developed by the Chemical Bath Deposition (CBD) were investigated in this paper. Results of optical Transmission, absorption, reflection spectra, optical conductance, refractive index, extension coefficient, real and imaginary dielectric constants studies are reported. The optical properties were obtained using UV-VIS Double Beam Spectrophotometer Version 6.51 in the wavelength range 200-1100 nm...
Keywords: Chemical bath deposition; transmittance; absorbance; reflectance; band-gap; dielectric constant; refractive index; extinction coefficient; CdS
|Silicon Photonics: A Solution for Ultra High Speed Data Transfer - Pratik Ganguly, Rahul .S|
Silicon photonics is the integration of integrated optics and photonics IC technologies in silicon. Silicon photonics has recently attracted a great deal of attention since it offers an opportunity for low cost solutions for various applications ranging from telecommunications to chip-chip inter connects. Two keys to this advancement are the increased speed of communications (now at the speed of light) and the increased amount of data that can be transmitted at once (i.e., bandwidth)...
Keywords: silicon photonics; Light source; silicon waveguide; silicon modulator; Photo detector; indirect band gap; compatibility-quad; gallium nitride
|Ling Zang - Energy Efficiency and Renewable Energy Through Nanotechnology|
Ling Zang - Energy Efficiency and Renewable Energy Through Nanotechnology
Keywords: solar; organic; energy; chem; cells; photocatalytic; phys; surface; layer; hydrogen; solar cells; appl phys; carbon dioxide; phys chem; organic solar; phys lett; solar cell; band gap; hydrogen storage; thin film